M85.1
Non-Billable

Skeletal fluorosis

Non-Billable / Non-Specific Code

What is Skeletal fluorosis?

ICD-10-CM M85.1 is the diagnosis code for Skeletal fluorosis. This code falls under the section "Disorders of bone density and structure" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.

Coding Guidelines for M85.1

Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.

ICD-10-CM Code Hierarchy

Understanding where M85.1 sits in the ICD-10-CM classification helps ensure proper coding:

Sub-Codes 10 entries
M85.10Skeletal fluorosis, unspecified siteBillableM85.11Skeletal fluorosis, shoulderNon-BillableM85.111Skeletal fluorosis, right shoulderBillableM85.112Skeletal fluorosis, left shoulderBillableM85.119Skeletal fluorosis, unspecified shoulderBillableM85.12Skeletal fluorosis, upper armNon-BillableM85.121Skeletal fluorosis, right upper armBillableM85.122Skeletal fluorosis, left upper armBillableM85.129Skeletal fluorosis, unspecified upper armBillableM85.13Skeletal fluorosis, forearmNon-BillableM85.131Skeletal fluorosis, right forearmBillableM85.132Skeletal fluorosis, left forearmBillableM85.139Skeletal fluorosis, unspecified forearmBillableM85.14Skeletal fluorosis, handNon-BillableM85.141Skeletal fluorosis, right handBillableM85.142Skeletal fluorosis, left handBillableM85.149Skeletal fluorosis, unspecified handBillableM85.15Skeletal fluorosis, thighNon-BillableM85.151Skeletal fluorosis, right thighBillableM85.152Skeletal fluorosis, left thighBillableM85.159Skeletal fluorosis, unspecified thighBillableM85.16Skeletal fluorosis, lower legNon-BillableM85.161Skeletal fluorosis, right lower legBillableM85.162Skeletal fluorosis, left lower legBillableM85.169Skeletal fluorosis, unspecified lower legBillableM85.17Skeletal fluorosis, ankle and footNon-BillableM85.171Skeletal fluorosis, right ankle and footBillableM85.172Skeletal fluorosis, left ankle and footBillableM85.179Skeletal fluorosis, unspecified ankle and footBillableM85.18Skeletal fluorosis, other siteBillableM85.19Skeletal fluorosis, multiple sitesBillable
Related Codes

Frequently Asked Questions

Is M85.1 a billable ICD-10-CM code?

No, M85.1 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.

What does M85.1 mean?

M85.1 is the ICD-10-CM diagnosis code for "Skeletal fluorosis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.

What is the parent code of M85.1?

The parent code of M85.1 is M85 ("Other disorders of bone density and structure"). M85.1 provides a more specific classification within this category.

What section is M85.1 in?

M85.1 is located in Section M80-M85 — "Disorders of bone density and structure" within Chapter 13 of the ICD-10-CM Tabular List.

What are the sub-codes of M85.1?

M85.1 has 10 sub-code(s) that provide more specific detail: M85.10, M85.11, M85.12, M85.13, M85.14 and more.

When should I use M85.1?

Use M85.1 when the patients documented diagnosis matches "Skeletal fluorosis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.

People Also Ask

What is the ICD-10 code for Skeletal fluorosis?

The ICD-10-CM code for Skeletal fluorosis is M85.1.

Can M85.1 be used for primary diagnosis?

No, M85.1 is non-billable. Use a more specific sub-code for primary diagnosis billing.

What chapter is M85.1 in?

M85.1 is in Chapter 13 of the ICD-10-CM Tabular List.

Is M85.1 valid for 2026?

Yes, M85.1 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.

See Also

← PreviousM85.09Fibrous dysplasia (monostotic), multiple sitesNext →M85.10Skeletal fluorosis, unspecified site
Code Details
M85.1
Skeletal fluorosis
Non-Billable / Non-Specific Code
13 — Diseases of the musculoskeletal system and connective tissue (M00-M99)
M80-M85 — Disorders of bone density and structure
2026 ICD-10-CM